Compilare: main.cpp: In function 'void decomp(int)': main.cpp:19:10: warning: unused variable 'ch' [-Wunused-variable] 19 | char ch; | ^~ main.cpp: In function 'int main()': main.cpp:40:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:33:15: warning: unused variable 'k' [-Wunused-variable] 33 | int n,i,j,k,cnt=0,cer,val; | ^